Grain cleaner



G. B. ALLISON GRAIN CLEANER May 6 1924.

Filed March 5. 1921 t w v n Patented May 6, 1924.

GEORGE B. ALLISOLLOF Annxnnnmni vrnerfnra.

, GRAIN ennnnnapf Application filed March 3, 1921. Serial No. 449,352.

To all whom it may concern:

Be it known that I, GEORGE B. ALLISON, a citizen of the United States,residing at Alexandria, in the county of Arlington and State ofVirginia, have invented a new and useful Grain Cleaner, of which thefollow ing is a specification.

The device forming the subject matter of this application is adapted tobe used for cleaning or screening grain, and the invention aims toprovide novel means whereby a fine adjustment: may be obtained betweenrelatively movable members whereby the cleaning or screening operationis brought about.

It is within the province of the disclosure to improve generally and toenhance the utility of devices of that type to which the inventionappertains.

\Vithin the scope of what is claimed, a mechanic may work changes in thestruc ture shown, without departing from the spirit of the invention.

In the drawings :Figure 1. shows in top plan, a device constructed inaccordance with the invention; Figure 2 is a section on the line 2-2 ofFigure 1.; Figure 3 is a section on the line 3-3 of Figure 1; Figure 4is a sectional detail taken through the trough and attendant parts;Figureo is a sectional detail illustrating one of the supports.

The device includes a lower frame made up of tubular cross members 1connected by tie rods 2. A trough 3 is located at one end of the lowerframe and has a flange 4 secured to the members -1. Supports areprovided, each including a body 6, a curved arm 7 and a straight armportion 8. The arm portions 7 are secured to the outermost cross members1 of the lower frame. Screws 9 are threaded into the arm portions 8. Thewalls 10 of a box or a part of an agricultural machine are adapted to beengaged by the screws 9, and, thus, the cleaner is held in place.

The cleaner includes an upper frame made up oftubular cross members .11connected by tie rods 12 and by an end bar 14. the bar 14. being locatedremotely from the trough 3. The members 11 of the upper frame aredisposed in alternating order with respect to the members 1 of the lowerfran'ie and are of smaller dimeter than'the said members ,1.

Screws 15 and 16 are threaded into the.

terminal cross members 11. The screws 16 are journaled in the flange lof the trough 3 and have enlarged heads 17 held for rotation in footplates 18, secured to the flange 4. The screws 15 are threaded into themembers 11 of the upper frame, as aforesaid, and are journaled inbridges l9 connecting certain of the cross members 1 of the lower frame,the screws being held against endwise movement in the lower frame byfoot plates 20 on the bridges. the construction being like that shown inFigure 4.

The cleaner slopes downwardly toward the trough 3 and the grain moveslongitudinally of the members 1 and 11. The material passing bet-weenthe members 11 and 1 falls downwardly between the members 1. whereas,the material which is too large to pass between the members 11, orbetween the members 11 and 1, moves into the trough 3. The space betweenthe members 11 and 1 may be adjusted to a: fine and minute degree byrotating the screws 16 and 15, the upper frame being adjusted withrespect to the lower frame, in this way.

Noting Figure 5 of the drawings. it will be clear that this cleaner maybe fastened readily-to the box of a fanning mill, the screws 9 affordingthe necessary adjustment whereby the cleaner may be placed and held onfanning mill boxes of different widths. Generally stated, the cleaner isadjustable, within limits. to fit any size of fanning mill.

Having thus described the invention, what is claimed is 1. A graincleaner embodying upper and lower frames comprising cross members, thecross members of one frame alternating with the cross members of theother frame: a trough located at one end of the cleaner and including apart engaging the cross members of the lower frame; a bridge connectingcertain of the cross members of the lower frame; and screws held forrotation but against longitudinal movement in said part. of the trough.and in the bridges, the screws being threaded into the cross members ofthe upper frame.

2. A grain cleaner embodying upper and lower frames comprising fixedcross me1nhers. all of the cross members being of circular crosssection, the cross members of the upper frame being of smaller diameterthan the cross members of the lower frame, the cross members of oneframe being disposed in alternating order with respect to In testimonythat I claim the foregoing the cross LIEU-(113613 oi the othel firamq;meape as my own, I have hereto affigted my signafor holdingfthe,crqsethembers aggtinst'ji'ota} ture in the presence of two; Witnesses.

tion; and means mounted directly inf eertain of the said eross membersof the frames for: GEORGE E. ALLISON. producing relative movementbetween the Witnesses; frames, thereby to adjust the space between. 151' E. SIMPSON,

the cross members of the different fl' -ames. AGNES ROCKELLI.

